What is Graupel?

Graupel is a form of precipitation that is created by atmospheric conditions which cause supercooled water
droplets to contact snow crystals and freeze to their surface.

Sometimes known as soft hail or snow pellets,
graupel is delicate and easily destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation similar to situations which produce snowfall.